Machine for shearing metal bars



3Sheets-Sheet 2'. W A. MGUOOL & W. G. ALGEO. MACHINE FOR SHBARING METAL BARS.

No. 488,659.. r Patented Dec. 27, 1892.

(No Model.)

3 Sheets-Sheet 3.. -W. A. McGOOL & W. G. ALGEO. MACHINE FOR SHEARING METAL BARS. No. 488,659.

n N 6 g m N W 4 m G m 1 w v m; 2 Q m m m fi 1 g (No Model.)

WITNESSES tries.

. WILLIAM A. MOCOOL AND WILLIAM G. ALGEO, OF BEAVER FALLS,

' PENNSYLVANIA.

MACHINE FOR SHEARING METAL BARS.

SPECIFICATION forming part of Letters Patent No. 488,659, dated December 2'7, 1892. Application filed March 25, 1892. Serial No. 426,391. (No model.)

To all tvhom it may concern.-

Be it known that we, WILLIAM A. MoCooL and WILLIAM G. ALGEO, citizens of the United States, residing at Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Shearing Metal Bars; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for cutting metal bars. Its object is to insure a clean cross cut ata true right angle of the cut to the axis of the bar, and to prevent bending the bar or unshaping its cross section outline. This object we accomplish by suitably supporting the bar, and firmly holding it between properly contoured matrices, in a right direction, till a quick, sharp, complete cut severs it as desired.

In the accompanying drawings, wherein like letters represent like parts, Figure I is a side elevation, with parts in section, of a ma chine embodying our invention; Fig. II is a vertical cross section, with parts in elevation, on the line a a of the first figure, showing the position of the parts at the moment the bar is cut; Fig. III is an enlarged vertical section, on the same plane as the second figure, of the holding and shearing devices after the cut off portion of the bar has been removed; Fig. IV is a vertical section on the line b b of the third figure; Fig. Vis afront elevation of the machine; Fig. VI is an enlarged vertical sec tio n, partly in elevation, on the line a c of the third figure; Fig. VII is an enlarged vertical section, partly in elevation, on the line (1 dof the fifth figure, and Fig. VIII is a front view of a shear for hexagonal bars.

A press, 2, has a shaft, 3, journaled in its upper part. Upon this shaft a bandwheel, 4, is sleeved. By throwing the clutch, 5, into gear with the hub of the bandwheel through the operation of the treadle, 6, rod, 7, and angle-arm 8, the shaft is rotated, so that the cam 9, keyed out of center upon the shaft, may force down the punch 10, which has a slotted bearing for the cam and is recessed in the arm of the press in order to be guided. A

case, 11, is fastened to the bed of the press. It contains a carrier, 12, and springs, 13, to throw up the carrier into normal position after a downward movement. It contains also a shear, 14, which has a slot, 15, and preferably a properly contoured recess, 16, in the cutting edge. In opposite sides of the case are corresponding slots, 17, for the passage of thebar, and in one side is a slot, 18, for the accommodation of ashaft, 19, which passes through said slot and through suitable journal bearings in the carrier, and into the slot of the shear. The shaft is rotated by a hand lever, 21, outside the case. Upon the shaft is a cam, 22, shaped and mounted like the cam upon the shaft of the press. This has a bearing in a slot, 23, out through a sliding block, 24, in the carrier. This block has a recess, 25, to receive an upper clamp die, 26, while the carrier has a seat, 27, to receive a lower clamp die, 28, and these dies are removable. The shear carries springs, 29, depending from its lower edge on each side the cutting recess or section, to throw up the shear into normal position after it has been forced down; the said springs finding a bearing upon or in the face of the lower die in the carrier.

The bar B, intended to be out, is passed through the slots of the aforementioned .case and between the clamping dies in the carrier. The hand lever 21 is pulled downward, causing the cam 22 to press the upper die of the carrier upon the bar, thus clamping it between the recessed faces of the two dies. The foot of the operator is then applied to the treadle 6, whereby the punch 10 is brought down swiftly upon the head of the shear, forcing the edge through the metal bar and effecting the desired cut.

By forming the case 11 with an offset, 30,

it is practicable to give efficient horizontab l support to a long bar in addition to that supplied by the clamping dies. But inasmuch as metal bars of great hardness have to be cut, without the least bending or distortion of axis or circumference, we form a recess, 31, in the top of the offset, to receive a clamping die, 32, andover and attached to the oifset we provide a screw press, 33, carrying another clamping die, 34, registering with the die below.

This screw press is actuated by a hand lever, 35, the threaded screw, 36, bearing upon the upper die, which is preferably provided with a socket, 37, in its head, so that the reversed 5 motion of the screw may conveniently release the remnant of the bar after a out. By means of this auxiliary clamping mechanism, the bar is firmly clamped on each side of the cuttingline.

to The whole construction and operation are so clearly indicated by the drawings to machinists and workers in bar metals that no further verbal explanations appear to be necessary.

1'5 Having thus fully described our invention,

we claim as follows:

1. The combination in a machine for cutting metal bars, of the case having an open top and in one side the cam-shaft slot, the bar slots, and the offset with recessed seat; the carrier, within said case, having the journal bearings and recessed die seat; the shaft, journaled in said case and carrier, and provided with the fixed eccentric cam and the hand 1e- 2 5 ver; the sliding block Within the carrier, having the cam slot and the die recess; the springs within the case beneath the carrier; the screw press upon the offset of the case; the two removable dies fitting respectively within the 3o recess of the sliding block and the recessed seat of the carrier and registering together;

the two removable dies fitting respectively t, within the screw press and the recessed seat of the aforesaid offset, and registering to- 5 gether; the shear within the case adjacent to the carrier and having the slot in the face thereof, and the springs pendent from its cutting edge, and the punch, fitting within the case and supported and operated above the 40 open top thereof by and from a suitable power press; the said case being suitably supported beneath the punch, and the whole being constructed and arranged substantially as and fdr the purposes described.

2. The combination, in a machine for cutting metal bars, of the case having the cam shaft slot and the bar slots in the walls thereof; the carrier, within the case, provided with the journal bearings and die seat; the shaft,

journaled in said case and carrier, and having the hand lever and fixed eccentric cam;

; t the sliding block, within the carrier, having the cam slot and the recess for an upper die;

the springs within said case beneath the carrier; the two removable dies fitting respectively within the die recesses of sliding block and carrier, and registering together; the having the slot in the face thereof and a the springs pendent from its cutting edge, and

the punch, fitting within said case and suithaving a bearing against the under part there-- of; the two removable dies fitting respectively in the die recesses of carrier and sliding block, and registering together, and the shear provided with the slot in the face thereof, moving in vertical guides, and suitably supported by the carrier; the said carrier and shear being relatively so arranged as to move together, and in the same direction, in the operation of the machine, and the whole being constructed substantially as and for the purposes described.

4. The combination, in a machine for outting metal bars, of the carrier having the j ournal bearings; the handled shaft, journaled in the carrier and having the fixed eccentric cam, and the sliding block within the carrier, having the cam slot; the said carrier being-suitably supported at a proper distance above the ground and the whole constructed and arranged substantially as described, whereby the said carrier and sliding block are adapted to co-operate with each other, for the purpose of grasping and holding a metal bar during the operation of cutting the same crosswise.

5. The combination, in a machine for cutting metal bars, of the perpendicular shear laterally supported and having avertical, reciprocating motion between a fixed guide; and a carrier the power-operated punch bearing upon the head of said shear and having a vertical reciprocating motion, and a spring supported beneath the shear, and bearing upward against the aforesaid carrier; all substantially as herein described, for the purpose of forcing said shear crosswise through a metal bar placed beneath the shear, and restoring said shear to position for another cut of the bar.

In testimony whereof we affix our signa-e. tures, in presence of two witnesses, this 18th= day of March, A. D. 1892.

WILLIAM A. MoOOOL. WILLIAM G. ALGEO. Witnesses:

Tnos. MURRAY, E. O. REBEsKE. 

